update micro configs, add uxntal syntax hilighting

micro/bindings.json

@@ -0,0 +1,8 @@
+{
+    "Alt-/": "lua:comment.comment",
+    "Alt-a": "lua:snippets.Accept",
+    "Alt-d": "lua:snippets.Cancel",
+    "Alt-s": "lua:snippets.Insert",
+    "Alt-w": "lua:snippets.Next",
+    "CtrlUnderscore": "lua:comment.comment"
+}

micro/syntax/uxn.yaml

@@ -0,0 +1,11 @@
+filetype: uxntal
+
+detect:
+  filename: "\\.tal$"
+
+rules:
+  - constant: "[\"#'|$][^\ \n\r]+"
+  - identifier: "[@,;.&][^\ \n\r]+"
+  - statement: "\\b(BRK|LIT|NOP|POP|DUP|SWP|OVR|ROT|EQU|NEQ|GTH|LTH|JMP|JCN|JSR|STH|LDZ|STZ|LDR|STR|LDA|STA|DEI|DEO|ADD|SUB|MUL|DIV|AND|ORA|EOR|SFT)[2rk]?\\b"
+  - comment: "\\([\\S\\s]*\\)"
+  - symbol: "\\[|\\]"