build(deps): vendor libvterm at v0.3.3

Problem: Adding support for modern Nvim features (reflow, OSC 8, full
utf8/emoji support) requires coupling libvterm to Nvim internals
(e.g., utf8proc).

Solution: Vendor libvterm at v0.3.3.

2 files changed, 42 insertions, 0 deletions

diff --git a/src/vterm/encoding/DECdrawing.inc b/src/vterm/encoding/DECdrawing.inc
new file mode 100644
index 0000000000..627397bcc2
--- /dev/null
+++ b/src/vterm/encoding/DECdrawing.inc
@@ -0,0 +1,36 @@
+static const struct StaticTableEncoding encoding_DECdrawing = {
+  { .decode = &decode_table },
+  {
+    [0x60] = 0x25C6,  // BLACK DIAMOND
+    [0x61] = 0x2592,  // MEDIUM SHADE (checkerboard)
+    [0x62] = 0x2409,  // SYMBOL FOR HORIZONTAL TAB
+    [0x63] = 0x240C,  // SYMBOL FOR FORM FEED
+    [0x64] = 0x240D,  // SYMBOL FOR CARRIAGE RETURN
+    [0x65] = 0x240A,  // SYMBOL FOR LINE FEED
+    [0x66] = 0x00B0,  // DEGREE SIGN
+    [0x67] = 0x00B1,  // PLUS-MINUS SIGN (plus or minus)
+    [0x68] = 0x2424,  // SYMBOL FOR NEW LINE
+    [0x69] = 0x240B,  // SYMBOL FOR VERTICAL TAB
+    [0x6a] = 0x2518,  // BOX DRAWINGS LIGHT UP AND LEFT (bottom-right corner)
+    [0x6b] = 0x2510,  // BOX DRAWINGS LIGHT DOWN AND LEFT (top-right corner)
+    [0x6c] = 0x250C,  // BOX DRAWINGS LIGHT DOWN AND RIGHT (top-left corner)
+    [0x6d] = 0x2514,  // BOX DRAWINGS LIGHT UP AND RIGHT (bottom-left corner)
+    [0x6e] = 0x253C,  // BOX DRAWINGS LIGHT VERTICAL AND HORIZONTAL (crossing lines)
+    [0x6f] = 0x23BA,  // HORIZONTAL SCAN LINE-1
+    [0x70] = 0x23BB,  // HORIZONTAL SCAN LINE-3
+    [0x71] = 0x2500,  // BOX DRAWINGS LIGHT HORIZONTAL
+    [0x72] = 0x23BC,  // HORIZONTAL SCAN LINE-7
+    [0x73] = 0x23BD,  // HORIZONTAL SCAN LINE-9
+    [0x74] = 0x251C,  // BOX DRAWINGS LIGHT VERTICAL AND RIGHT
+    [0x75] = 0x2524,  // BOX DRAWINGS LIGHT VERTICAL AND LEFT
+    [0x76] = 0x2534,  // BOX DRAWINGS LIGHT UP AND HORIZONTAL
+    [0x77] = 0x252C,  // BOX DRAWINGS LIGHT DOWN AND HORIZONTAL
+    [0x78] = 0x2502,  // BOX DRAWINGS LIGHT VERTICAL
+    [0x79] = 0x2A7D,  // LESS-THAN OR SLANTED EQUAL-TO
+    [0x7a] = 0x2A7E,  // GREATER-THAN OR SLANTED EQUAL-TO
+    [0x7b] = 0x03C0,  // GREEK SMALL LETTER PI
+    [0x7c] = 0x2260,  // NOT EQUAL TO
+    [0x7d] = 0x00A3,  // POUND SIGN
+    [0x7e] = 0x00B7,  // MIDDLE DOT
+  }
+};
diff --git a/src/vterm/encoding/uk.inc b/src/vterm/encoding/uk.inc
new file mode 100644
index 0000000000..5c7700226b
--- /dev/null
+++ b/src/vterm/encoding/uk.inc
@@ -0,0 +1,6 @@
+static const struct StaticTableEncoding encoding_uk = {
+  { .decode = &decode_table },
+  {
+    [0x23] = 0x00a3,  // £
+  }
+};