first pass of merging in warp (doesn't build)

crates/languages/grammars/README.md

@@ -2,7 +2,7 @@
 Example of how to add a new language grammar: https://github.com/warpdotdev/warp-internal/pull/11501/files
 
 ## TSLanguage
-We need a [TSLanguage(https://tree-sitter.github.io/tree-sitter/using-parsers#the-basic-objects) object to parse a source code file. We use open-source libraries that provide functions that create these objects. These functions are usually written in C but we can use them in Rust crates.
+We need a [TSLanguage](https://tree-sitter.github.io/tree-sitter/using-parsers#the-basic-objects) object to parse a source code file. We use open-source libraries that provide functions that create these objects. These functions are usually written in C but we can use them in Rust crates.
 
 ## config.yaml
 You can find this information on language specific documentation and style guides.

crates/languages/grammars/jq/config.yaml

@@ -0,0 +1,13 @@
+display_name: "jq"
+indent_unit:
+  space: 2
+comment_prefix: "#"
+brackets:
+  - start: "{"
+    end: "}"
+  - start: "("
+    end: ")"
+  - start: "["
+    end: "]"
+  - start: "\""
+    end: "\""

crates/languages/grammars/nix/config.yaml

@@ -0,0 +1,11 @@
+display_name: "Nix"
+indent_unit:
+  space: 2
+comment_prefix: "#"
+brackets:
+  - start: "{"
+    end: "}"
+  - start: "("
+    end: ")"
+  - start: "["
+    end: "]"

crates/languages/grammars/nix/identifiers.scm

@@ -0,0 +1,6 @@
+(comment) @comment
+
+; Nix has no named function or class declarations; the meaningful symbols are
+; attribute bindings (`name = value;`) in attrsets and `let` blocks.
+(binding
+  attrpath: (attrpath) @definition.binding)

crates/languages/grammars/nix/indents.scm

@@ -0,0 +1,36 @@
+; Adapted from Helix's runtime/queries/nix/indents.scm, reduced to the plain
+; @indent / @outdent captures Warp's indent engine consumes.
+
+; One level per bracketed scope; the matching close token dedents.
+[
+  (attrset_expression)
+  (rec_attrset_expression)
+  (let_attrset_expression)
+  (list_expression)
+  (parenthesized_expression)
+  (formals)
+] @indent
+
+[
+  "}"
+  ")"
+  "]"
+] @outdent
+
+; A binding value carried onto the line(s) after `=`. It shares the `=` line
+; with a same-line bracket, so `x = { … }` is not indented twice.
+(binding) @indent
+
+; `let … in`: keep the bindings indented; pull the body back to the `let` level.
+(let_expression) @indent
+(let_expression body: (_) @outdent)
+
+; `if … then … else`: indent each branch.
+(if_expression
+  consequence: (_) @indent)
+(if_expression
+  alternative: (_) @indent)
+
+; Function application: arguments carried onto following lines. Nested
+; applications share a line, so they collapse to a single level.
+(apply_expression) @indent