chore: Extract languages from zed crate (#8270)

- Moves languages module from `zed` into a separate crate. That way we
have less of a long pole at the end of compilation.
- Removes moot dependencies on editor/picker. This is totally harmless
and might help in the future if we decide to decouple picker from
editor.

Before:
```
Number of crates that depend on 'picker' but not on 'editor': 1
Total number of crates that depend on 'picker': 13
Total number of crates that depend on 'editor': 30
```
After:
```
Number of crates that depend on 'picker' but not on 'editor': 5
Total number of crates that depend on 'picker': 12
Total number of crates that depend on 'editor': 26
```
The more crates depend on just picker but not editor, the better in that
case.

Release Notes:

- N/A

crates/languages/src/prisma/config.toml

@@ -0,0 +1,9 @@
+name = "Prisma"
+grammar = "prisma"
+path_suffixes = ["prisma"]
+line_comments = ["// "]
+brackets = [
+    { start = "{", end = "}", close = true, newline = true },
+    { start = "[", end = "]", close = true, newline = true },
+    { start = "(", end = ")", close = true, newline = true }
+]

crates/languages/src/prisma/highlights.scm

@@ -0,0 +1,26 @@
+[
+ "datasource"
+ "enum"
+ "generator"
+ "model"
+] @keyword
+
+(comment) @comment
+(developer_comment) @comment
+
+(arguments) @property
+(attribute) @function
+(call_expression) @function
+(column_type) @type
+(enumeral) @constant
+(identifier) @variable
+(string) @string
+
+"(" @punctuation.bracket
+")" @punctuation.bracket
+"[" @punctuation.bracket
+"]" @punctuation.bracket
+"{" @punctuation.bracket
+"}" @punctuation.bracket
+"=" @operator
+"@" @operator