Import claude-code-switcher from the Windows build

Source of truth so far has been c:\Users\smoido\projects\cli on the Windows
box, which has no git history of its own. This is that tree copied verbatim over
SSH, minus dist/ - the PowerShell build, the POSIX port under linux/, and the
presets both share.

Recorded as its own commit so that everything after it is a reviewable diff
rather than an undifferentiated first drop.

presets/lmstudio.json

@@ -0,0 +1,21 @@
+{
+  "provider": "lmstudio",
+  "description": "Local KAT-Coder v2.5. NOTE: its chat template asserts message order - if you hit 'Unable to generate parser for this template', use the lmstudio-qwen preset.",
+  "baseUrl": "http://127.0.0.1:1234",
+  "auth": {
+    "mode": "literal",
+    "token": "lmstudio"
+  },
+  "models": {
+    "opus": "kwaipilot_kat-coder-v2.5-dev",
+    "sonnet": "kwaipilot_kat-coder-v2.5-dev",
+    "haiku": "kwaipilot_kat-coder-v2.5-dev",
+    "fable": "kwaipilot_kat-coder-v2.5-dev"
+  },
+  "subagentModel": "kwaipilot_kat-coder-v2.5-dev",
+  "gatewayModelDiscovery": true,
+  "extraEnv": {
+    "CLAUDE_CODE_ATTRIBUTION_HEADER": "0"
+  },
+  "contextTokens": 262144
+}