Include WASI 0.2.6 WITs

Signed-off-by: itowlson <[email protected]>

Author: itowlson

examples/spin-timer/Cargo.lock

@@ -0,0 +1,10 @@
+package wasi:cli@0.2.6;
+
+@since(version = 0.2.0)
+world command {
+  @since(version = 0.2.0)
+  include imports;
+
+  @since(version = 0.2.0)
+  export run;
+}

wit/deps/cli/command.wit renamed to wit/deps/[email protected]/command.wit

@@ -0,0 +1,22 @@
+@since(version = 0.2.0)
+interface environment {
+  /// Get the POSIX-style environment variables.
+  ///
+  /// Each environment variable is provided as a pair of string variable names
+  /// and string value.
+  ///
+  /// Morally, these are a value import, but until value imports are available
+  /// in the component model, this import function should return the same
+  /// values each time it is called.
+  @since(version = 0.2.0)
+  get-environment: func() -> list<tuple<string, string>>;
+
+  /// Get the POSIX-style arguments to the program.
+  @since(version = 0.2.0)
+  get-arguments: func() -> list<string>;
+
+  /// Return a path that programs should use as their initial current working
+  /// directory, interpreting `.` as shorthand for this.
+  @since(version = 0.2.0)
+  initial-cwd: func() -> option<string>;
+}