add readme

Readme.md

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+
+# term.c
+
+  Terminal goodies.
+
+## API
+
+```c
+// aliases
+
+#define term_bold term_bright
+
+// display
+
+#define term_reset() term_write("0m")
+#define term_bright() term_write("1m")
+#define term_dim() term_write("2m")
+#define term_underline() term_write("4m")
+#define term_blink() term_write("5m")
+#define term_reverse() term_write("7m")
+#define term_hidden() term_write("8m")
+
+// cursor
+
+#define term_hide_cursor() term_write("?25l")
+#define term_show_cursor() term_write("?25h")
+
+// size
+
+int
+term_size(int *width, int *height);
+
+// movement
+
+void
+term_move_by(int x, int y);
+
+void
+term_move_to(int x, int y);
+
+// erasing
+
+const char *
+term_erase_from_name(const char *name);
+
+int
+term_erase(const char *name);
+
+// colors
+
+int
+term_color_from_name(const char *name);
+
+int
+term_color(const char *name);
+
+int
+term_background(const char *name);
+```