encodings: Add English Pokémon generation 1 character encoding (#42)

* encodings: Add English Pokémon generation 1 character encoding

Source: https://bulbapedia.bulbagarden.net/wiki/Character_encoding_(Generation_I)#English

* readme: Add `pokegen1_en.tbl`

encodings/pokegen1_en.tbl

@@ -0,0 +1,255 @@
+00=NUL
+01
+02
+03
+04
+05
+06
+07
+08
+09
+0A
+0B
+0C
+0D
+0E
+0F
+11
+12
+13
+14
+15
+16
+17
+18
+19
+1A
+1B
+1C
+1D
+1E
+1F
+20
+21
+22
+23
+24
+25
+26
+27
+28
+29
+2A
+2B
+2C
+2D
+2E
+2F
+30
+31
+32
+33
+34
+35
+36
+37
+38
+39
+3A
+3B
+3C
+3D
+3E
+3F
+40
+41
+42
+43
+44
+45
+46
+47
+48
+49=page
+4A=PkMn
+4B=_cont
+4C=autocont
+4D
+4E=next line
+4F=bottom line
+50=end
+51=paragraph
+52=player name
+53=rival name
+54=Poké
+55=cont
+56=......
+57=done
+58=prompt
+59=target
+5A=user
+5B=PC
+5C=TM
+5D=TRAINER
+5E=ROCKET
+5F=dex
+60=A
+61=B
+62=C
+63=D
+64=E
+65=F
+66=G
+67=H
+68=I
+69=V
+6A=S
+6B=L
+6C=M
+6D=:
+6E=ぃ
+6F=ぅ
+70=‘
+71=’
+72=“
+73=”
+74=・
+75=⋯
+76=ぁ
+77=ぇ
+78=ぉ
+79
+7A
+7B
+7C
+7D
+7E
+7F
+80=A
+81=B
+82=C
+83=D
+84=E
+85=F
+86=G
+87=H
+88=I
+89=J
+8A=K
+8B=L
+8C=M
+8D=N
+8E=O
+8F=P
+90=Q
+91=R
+92=S
+93=T
+94=U
+95=V
+96=W
+97=X
+98=Y
+99=Z
+9A=(
+9B=)
+9C=
+9D=;
+9E=[
+9F=]
+A0=a
+A1=b
+A2=c
+A3=d
+A4=e
+A5=f
+A6=g
+A7=h
+A8=i
+A9=j
+AA=k
+AB=l
+AC=m
+AD=n
+AE=o
+AF=p
+B0=q
+B1=r
+B2=s
+B3=t
+B4=u
+B5=v
+B6=w
+B7=x
+B8=y
+B9=z
+BA=é
+BB='d
+BC='l
+BD='s
+BE='t
+BF='v
+C0
+C1
+C2
+C3
+C4
+C5
+C6
+C7
+C8
+C9
+CA
+CB
+CC
+CD
+CE
+CF
+D0
+D1
+D2
+D3
+D4
+D5
+D6
+D7
+D8
+D9
+DA
+DB
+DC
+DD
+DE
+DF
+E0='
+E1=Pk
+E2=Mn
+E3=-
+E4='r
+E5='m
+E6=?
+E7=!
+E8=.
+E9=ァ
+EA=ゥ
+EB=ェ
+EC=▷
+ED=▶
+EE=▼
+EF=♂
+F0=$
+F1=×
+F2=.
+F3=/
+F4=,
+F5=♀
+F6=0
+F7=1
+F8=2
+F9=3
+FA=4
+FB=5
+FC=6
+FD=7
+FE=8
+FF=9