feat: modernize codebase and improve test quality

This commit integrates improvements from several pending PRs and addresses
key user feedback:

## Template Improvements (PR #184)
- Use t.Fatalf() instead of t.Errorf() + return in subtests
- Improves test ergonomics and reduces boilerplate
- Updated golden test files to reflect new behavior

## Documentation Updates (PR #185, #180)
- Document the -named flag for map-based table tests
- Update installation from go get to go install (go get deprecated)
- Update minimum Go version to 1.16

## Use stdlib embed (PR #181)
- Replace esc/go-bindata with Go 1.16+ embed package
- Removes 834+ lines of generated code and 3rd party dependencies
- Simplifies template loading and reduces maintenance burden
- Convert symlinks in testify templates to real files for embed compatibility

Breaking Changes:
- Minimum Go version bumped from 1.6 to 1.16 (for embed support)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: cweill

.claude/settings.local.json

@@ -0,0 +1,24 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(git add:*)",
+      "Bash(git commit:*)",
+      "Bash(gh issue list:*)",
+      "Bash(gh pr list:*)",
+      "Bash(gh issue view:*)",
+      "Bash(gh pr view:*)",
+      "Bash(git tag:*)",
+      "Bash(git show:*)",
+      "Bash(go generate:*)",
+      "Bash(go test:*)",
+      "Bash(gh pr diff:*)",
+      "Bash(gh api:*)",
+      "Bash(for f in *.tmpl)",
+      "Bash(do if [ -L \"$f\" ])",
+      "Bash(fi)",
+      "Bash(done)"
+    ],
+    "deny": [],
+    "ask": []
+  }
+}

README.md

@@ -10,12 +10,11 @@ The following shows `gotests` in action using the [official Sublime Text 3 plugi
 
 ## Installation
 
-__Minimum Go version:__ Go 1.6
-
-Use [`go get`](https://golang.org/cmd/go/#hdr-Download_and_install_packages_and_dependencies) to install and update:
+__Minimum Go version:__ Go 1.16
 
+Use [`go install`](https://pkg.go.dev/cmd/go#hdr-Compile_and_install_packages_and_dependencies) to install and update:
 ```sh
-$ go get -u github.com/cweill/gotests/...
+$ go install github.com/cweill/gotests/gotests@latest
 ```
 
 ## Usage
@@ -39,6 +38,8 @@ Available options:
 
   -i                    print test inputs in error messages
 
+  -named                switch table tests from using slice to map (with test name for the key)
+
   -only                 regexp. generate tests for functions and methods that match only.
                          Takes precedence over -all
 

go.mod

@@ -2,4 +2,4 @@ module github.com/cweill/gotests
 
 require golang.org/x/tools v0.0.0-20191109212701-97ad0ed33101
 
-go 1.6
+go 1.16