feat(lang): add Pine Script support via vendored kvarenzn/tree-sitter-pine (#273)

Adds Pine Script (TradingView's indicator/strategy DSL) as a first-class
language using the project's existing language-add pipeline:

- scripts/new-languages.json: register pine (display "PineScript",
  ts_func tree_sitter_pine, repo kvarenzn/tree-sitter-pine, extension
  .pine, has_scanner=true, module_root source_file)
- internal/cbm/vendored/grammars/pine/: vendored from
  https://github.com/kvarenzn/tree-sitter-pine via scripts/vendor-grammar.sh
  — parser.c, scanner.c, tree_sitter/ headers. License is ISC (declared
  in upstream package.json; written into vendored LICENSE for clarity
  since upstream has no LICENSE file)
- internal/cbm/grammar_pine.c: 4-line wrapper generated by
  scripts/generate-lang-code.py wrappers
- internal/cbm/cbm.h: CBM_LANG_PINE before CBM_LANG_COUNT
- internal/cbm/lang_specs.c: 7 node-type arrays (func / class /
  module / call / var / branch / assign) cross-checked against
  kvarenzn's grammar.js, plus the spec table entry
- src/discover/language.c: .pine -> CBM_LANG_PINE extension dispatch
  and "PineScript" name

scripts/audit-grammar-security.sh on the vendored grammar: no
dangerous includes (only string/stdint/stdbool/stdlib), no system /
popen / exec / socket / mmap / dlopen calls, no constructor/destructor
attributes, no inline asm. The 148-line scanner.c only handles
INDENT/DEDENT/NEWLINE tokens via the standard tree-sitter lexer API.

Distilled from #273 rather than vendored verbatim because the
original PR's parser.c was a plain 46k-line drop without provenance,
no LICENSE attribution, and bundled an unrelated Makefile change
(scripts/embed-frontend.sh -> sh scripts/embed-frontend.sh) that
didn't belong to a Pine Script feature. The node-type choices in
the lang spec match the original PR's selections, all of which were
verified to be real grammar.js rules.

Full suite: 2840 passed, 0 failed under ASan + UBSan.

Closes #273.

Co-authored-by: vinay-veerappa <vinay.veerappa@gmail.com>

Author: vinay-veerappa

internal/cbm/cbm.h

@@ -166,6 +166,7 @@ typedef enum {
     CBM_LANG_SOSL,
     CBM_LANG_KUSTOMIZE, // kustomization.yaml — Kubernetes overlay tool
     CBM_LANG_K8S,       // Generic Kubernetes manifest (apiVersion: detected)
+    CBM_LANG_PINE,      // Pine Script (TradingView indicator / strategy language)
     CBM_LANG_COUNT
 } CBMLanguage;
 

internal/cbm/grammar_pine.c

@@ -0,0 +1,4 @@
+// Vendored tree-sitter grammar: pine
+// Each grammar compiled as separate unit (conflicting static symbols).
+#include "vendored/grammars/pine/parser.c"
+#include "vendored/grammars/pine/scanner.c"

internal/cbm/lang_specs.c

@@ -161,6 +161,7 @@ extern const TSLanguage *tree_sitter_gomod(void);
 extern const TSLanguage *tree_sitter_apex(void);
 extern const TSLanguage *tree_sitter_soql(void);
 extern const TSLanguage *tree_sitter_sosl(void);
+extern const TSLanguage *tree_sitter_pine(void);
 
 // -- Empty sentinel --
 static const char *empty_types[] = {NULL};
@@ -1501,6 +1502,18 @@ static const char *sosl_module_types[] = {"source_file", NULL};
 
 static const char *make_func_types[] = {"recipe", NULL};
 static const char *make_import_types[] = {"include", "include_directive", NULL};
+
+// ==================== PINE SCRIPT ====================
+// Node names verified against kvarenzn/tree-sitter-pine grammar.js.
+static const char *pine_func_types[] = {"function_declaration_statement", NULL};
+static const char *pine_class_types[] = {"type_definition_statement", NULL};
+static const char *pine_module_types[] = {"source_file", NULL};
+static const char *pine_call_types[] = {"call", NULL};
+static const char *pine_var_types[] = {"variable_definition_statement", "tuple_declaration_statement",
+                                       NULL};
+static const char *pine_branch_types[] = {"if_statement",       "switch_statement", "for_statement",
+                                          "for_in_statement",   "while_statement",  NULL};
+static const char *pine_assign_types[] = {"reassignment_statement", NULL};
 // ==================== SPEC TABLE ====================
 
 static const CBMLangSpec lang_specs[CBM_LANG_COUNT] = {
@@ -2428,6 +2441,12 @@ static const CBMLangSpec lang_specs[CBM_LANG_COUNT] = {
                       empty_types, empty_types, empty_types, empty_types, empty_types, empty_types,
                       empty_types, NULL, empty_types, NULL, NULL, tree_sitter_yaml, NULL},
 
+    // CBM_LANG_PINE — Pine Script (TradingView). kvarenzn/tree-sitter-pine (ISC).
+    [CBM_LANG_PINE] = {CBM_LANG_PINE, pine_func_types, pine_class_types, empty_types,
+                       pine_module_types, pine_call_types, empty_types, empty_types,
+                       pine_branch_types, pine_var_types, pine_assign_types, empty_types, NULL,
+                       empty_types, NULL, NULL, tree_sitter_pine, NULL},
+
 };
 
 _Static_assert(sizeof(lang_specs) / sizeof(lang_specs[0]) == CBM_LANG_COUNT,

internal/cbm/vendored/grammars/pine/LICENSE

@@ -0,0 +1,18 @@
+Upstream: https://github.com/kvarenzn/tree-sitter-pine
+License declared in upstream package.json: ISC
+
+ISC License
+
+Copyright (c) kvarenzn
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.