fix(argent): ship tree-sitter so react-profiler-component-source finds components

[latekvo]

Problem

react-profiler-component-source returns found:false for every component in a standard TS/TSX project. Root cause: @swmansion/argent never declared tree-sitter / tree-sitter-typescript as runtime deps, so the bundle's require("tree-sitter") throws, the error is swallowed, and the AST index is always empty.

Verified on the shipped 0.12.0 bundle: tree-sitter and tree-sitter-typescript are MODULE_NOT_FOUND from the installed tool-server.

Fix

• Declare both as dependencies of @swmansion/argent and mark them external in the tools bundle (native .node addons can't be inlined by esbuild; they must resolve from the install at runtime).
• Index memo() / forwardRef() / React.memo() component declarations (their value node is a call_expression, previously skipped entirely — and profiler-flagged components are disproportionately memo-wrapped).
• Surface an actionable message when the parser can't load instead of a misleading "not found".

Verification

• Installed the two deps into the shipped 0.12.0 package, restarted the tool-server, re-ran the tool: LoggedOut → LoggedOut.tsx:35, SplashScreen → SplashScreen.tsx:23, Button, Text all now resolve (were found:false for all).
• New ast-index unit test covers plain/default/arrow + memo/forwardRef/React.memo/nested forms and guards treeSitterAvailable.
• tsc --build clean, 1254 tool-server tests pass, eslint + prettier clean.

Supersedes #287 (that branch was based on a much older main and could not be rebased cleanly through the bundle-tools.cjs rewrite). Closes #287.