mod(structure): update project structure

Remove examples, add description for design goals in README.md and
apply re-names and naming changes accordingly for the project structure.
Implement a flat hierachry, as the library shall remain pretty simple.

src/terminal.zig

@@ -1,9 +1,9 @@
 const std = @import("std");
-pub const Key = @import("terminal/Key.zig");
-pub const Size = @import("terminal/Size.zig");
-pub const Position = @import("terminal/Position.zig");
-pub const Cell = @import("terminal/Cell.zig");
-pub const code_point = @import("code_point");
+const code_point = @import("code_point");
+
+const Key = @import("key.zig");
+const Size = @import("size.zig");
+const Cell = @import("cell.zig");
 
 const log = std.log.scoped(.terminal);
 
@@ -78,13 +78,13 @@ pub fn writer() Writer {
     return .{ .context = .{} };
 }
 
-pub fn setCursorPosition(pos: Position) !void {
+pub fn setCursorPosition(pos: Size.Position) !void {
     var buf: [64]u8 = undefined;
     const value = try std.fmt.bufPrint(&buf, "\x1b[{d};{d}H", .{ pos.row, pos.col });
     _ = try std.posix.write(std.posix.STDIN_FILENO, value);
 }
 
-pub fn getCursorPosition() !Position {
+pub fn getCursorPosition() !Size.Position {
     // Needs Raw mode (no wait for \n) to work properly cause
     // control sequence will not be written without it.
     _ = try std.posix.write(std.posix.STDIN_FILENO, "\x1b[6n");
@@ -227,7 +227,3 @@ fn getReportMode(ps: u8) ReportMode {
         else => ReportMode.not_recognized,
     };
 }
-
-test {
-    _ = Cell;
-}