Add Loki and Sentinel utility classes for web API endpoints

- Implemented LokiUtils class with GET and POST endpoints for managing scripts, jobs, and payloads.
- Added SentinelUtils class with GET and POST endpoints for managing events, rules, devices, and notifications.
- Both classes include error handling and JSON response formatting.

bifrost/faces.py

@@ -0,0 +1,66 @@
+"""
+Bifrost — ASCII face definitions.
+Ported from pwnagotchi/ui/faces.py with full face set.
+"""
+
+LOOK_R = '( \u2686_\u2686)'
+LOOK_L = '(\u2609_\u2609 )'
+LOOK_R_HAPPY = '( \u25d5\u203f\u25d5)'
+LOOK_L_HAPPY = '(\u25d5\u203f\u25d5 )'
+SLEEP = '(\u21c0\u203f\u203f\u21bc)'
+SLEEP2 = '(\u2256\u203f\u203f\u2256)'
+AWAKE = '(\u25d5\u203f\u203f\u25d5)'
+BORED = '(-__-)'
+INTENSE = '(\u00b0\u25c3\u25c3\u00b0)'
+COOL = '(\u2310\u25a0_\u25a0)'
+HAPPY = '(\u2022\u203f\u203f\u2022)'
+GRATEFUL = '(^\u203f\u203f^)'
+EXCITED = '(\u1d54\u25e1\u25e1\u1d54)'
+MOTIVATED = '(\u263c\u203f\u203f\u263c)'
+DEMOTIVATED = '(\u2256__\u2256)'
+SMART = '(\u271c\u203f\u203f\u271c)'
+LONELY = '(\u0628__\u0628)'
+SAD = '(\u2565\u2601\u2565 )'
+ANGRY = "(-_-')"
+FRIEND = '(\u2665\u203f\u203f\u2665)'
+BROKEN = '(\u2613\u203f\u203f\u2613)'
+DEBUG = '(#__#)'
+UPLOAD = '(1__0)'
+UPLOAD1 = '(1__1)'
+UPLOAD2 = '(0__1)'
+STARTING = '(. .)'
+READY = '( ^_^)'
+
+# Map mood name → face constant
+MOOD_FACES = {
+    'starting':    STARTING,
+    'ready':       READY,
+    'sleeping':    SLEEP,
+    'awake':       AWAKE,
+    'bored':       BORED,
+    'sad':         SAD,
+    'angry':       ANGRY,
+    'excited':     EXCITED,
+    'lonely':      LONELY,
+    'grateful':    GRATEFUL,
+    'happy':       HAPPY,
+    'cool':        COOL,
+    'intense':     INTENSE,
+    'motivated':   MOTIVATED,
+    'demotivated': DEMOTIVATED,
+    'friend':      FRIEND,
+    'broken':      BROKEN,
+    'debug':       DEBUG,
+    'smart':       SMART,
+}
+
+
+def load_from_config(config):
+    """Override faces from config dict (e.g. custom emojis)."""
+    for face_name, face_value in (config or {}).items():
+        key = face_name.upper()
+        if key in globals():
+            globals()[key] = face_value
+        lower = face_name.lower()
+        if lower in MOOD_FACES:
+            MOOD_FACES[lower] = face_value